Icon for a display screen



FIG. 1 is a front view of an icon for a display screen, the icon is shown separately for clarity of illustration;

FIG. 2 is a front view of a second embodiment thereof, the icon is shown separately for clarity of illustration;

FIG. 3 is a front view of a third embodiment thereof, the icon is shown separately for clarity of illustration;

FIG. 4 is a front view of the embodiment shown in FIG. 1, on a reduced scale, the broken line drawing of a display screen is for illustrative purpose only and forms no part of the claimed design;

FIG. 5 is a front view of a second embodiment shown in FIG. 2, on a reduced scale, the broken line drawing of a display screen is for illustrative purpose only and forms no part of the claimed design; and,

FIG. 6 is a front view of a third embodiment shown in FIG. 3, on a reduced scale, the broken line drawing of a display screen is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a icon for a display screen, as shown and described. 